How to select a discount on spare parts?

The contractual user selects the discount on spare parts they receive from the spare parts wholesaler.

The display of spare parts categories was previously entered by the platform administrator, and the contractual user cannot update them.

User: CONTRACTUAL USER ADMINISTRATOR

Scenario:

1. The user selects the system's starting URL.
2. The homepage opens.
3. The user navigates to the service settings.
4. The service settings page opens.
5. The user enters the discount for spare parts categories.
6. The data is saved.